Chrome Dev tools的几点小技巧
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a img, img a { cursor: pointer; }
pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; }
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a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; }
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.md-attr { display: none; }
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.MathJax_SVG { display: inline; font-style: normal; font-weight: 400; line-height: normal; zoom: 90%; text-indent: 0px; text-align: left; text-transform: none; letter-spacing: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; }
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video { max-width: 100%; display: block; margin: 0px auto; }
iframe { max-width: 100%; width: 100%; border: none; }
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table > tbody + tbody { border-top: 2px solid rgb(51, 51, 51); }
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-->
呼出快捷指令面板:
cmd + shift + p
在
Devtools界面下,键入
cmd + shift + p`将其激活,然后开始在栏中键入要查找的命令或输入?号以查看所有可用命令 .如下图:其中Open file,Go to line,Go to symbol对于快速打开文件和定位文件位置还是节省了不少时间.
1.性能监视器:> performance monitor
本地覆盖:
local overrides
感觉这个特性是超级棒。 使用我们自己的本地资源覆盖网页所使用的资源。 多说无益,直接举个例子大家就明白了。大家看到了吧,我们可以把网络资源直接和本地资源映射,再次刷新网页,取得资源文件就是本地的了。这种对js、css等文件批量修改调试特别有用。
local overrides
还可以模拟Mock
数据,如果后端API还不OK或者不想频繁的发布后台API。这个功能是相 当有用,不过听说还不支持XHR请求。
控制台内置指令
私以为如果网页里面如果没有引用jquery是不是就不能使用$这样的语法了,nonono
$(selector, [startNode])
:单选择器可以选择元素并触发元素事件.
$$(选择器,[startNode])
:全选择器
$x(path, [startNode])
:xpath
选择器
$x(path)
返回与给定xpath
表达式匹配的DOM元素数组 .
$x('//div'):返回页面上的所有div元素。
getEventListeners(object):获取指定对象的绑定事件
Console...的多种用法
1.变量打印:%s
、%o
、%d
、和%c
例如: const text = "文本1"
console.log(打印${text}
)
//结果为打印文本1
2.布尔断言打印:console.assert()
做前端调试时很有用。
3.console.table()
内容可以以表格的形式输出.
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- 【2019.8.11上午 慈溪模拟赛 T3】欢迎回来(back)(设阈值+莫队)
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